The idea that children cannot be protected from online pornography through Internet Service Provider filtering has again been exposed as without basis.

Calls this week in submissions to a Senate inquiry by content rights' holders for laws requiring ISPs to help in the war against piracy http://www.abc.net.au/pm/content/2015/s4220071.htm are further proof technology can be used to protect children without destroying the integrity of the internet, according to the Australian Christian Lobby.

ACL spokesperson Wendy Francis noted that there were even calls for Virtual Private Networks to be blocked, something claimed as impossible by internet libertarians during the Rudd Government's noble but failed bid to filter the internet against illegal content such as rape and bestiality porn.

"It is only blind ideology that prevents Australia from implementing ISP filtering with a default clean feed to protect children from pornography.

"While ACL would argue that evidence points to pornography being harmful for all ages and certainly degrading of women, adults could have the option of opting in.

"A default clean feed to protect children with opt-in for adults is a no-brainer.

"If technology can be used to protect content rights' holders revenue, surely it can be used to protect children," Ms Francis said.

"ACL respectfully calls on the Communications Minister Malcolm Turnbull to reconsider his opposition to ISP filtering."